https://aws.amazon.com/architecture/icons/ https://aws.amazon.com/architecture/icons/ may interest OP, as it offer all the sanctioned graphics in PNG and SVG R

https://aws.amazon.com/architecture/icons/ https://aws.amazon.com/architecture/icons/ may interest OP, as it offer all the sanctioned graphics in PNG and SVG Regrettably, there does not appear to be an Atom nor RSS feed, so I guess one of the IFTTT style web page watchers is the only way to know that new icons are available :-(